45. 30 . , 5 . (24 2).
46. , . Q. 60. .
47. , , , 2.
4p 10p. 4. . (64p).
49. , 120 240. , .
50. . , ℓ a.
51. , 120, , . . (16p).
52. V. , , . .
53. , , r = 2 . . (24p 3).
54. 2 1 . .
, , 80. (120).
56. 120. 12p. . .
57. ℓ a. . . .
6 8. , . . (96p).
, , 144p 25p. , 17. (676p).
10p 24p. , 7 . (676p).
61. 5, - 13. 1:2. .
62. = = 10, = 12. , . . (576p).
63. 120. 3p. .
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64. , , 120. R, 30. .
65. , , , 15. 20, 17. .
66. 4, - 10. , , . - . .
67. , , , . , 60, 32p.
68. , . 60. .
69. , 2:3, . .
70. , . . .
, 6 10 . , 7,5 . . (4,5 ).
72. ABCD a. 30. a, 45. (45).
73. a , a 30. 90. , a (4 ).
74. a b . ( a b ) . a b , - D, AM = CD, MC = 16, AB = 25. a 12. . (15).
75. a b. . a , b - . D; A = D, MC = 32, B = 50. a 24. . (54).
76. = = 25, = 48, BD - . BD = D . (8).
77. ABCD - , , Ð = 60, ^, = 0,5. D. (a).
78. C = BC = m, ÐCD = 120, ^. , m, . .
, 12 . 18 32 . . (0).
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80. 6. 30. , . . (0).
81. (-1; 2; 5) Q(3; -4; 1) , , (0; -2; -1) (3; 2; -1). . (3x + 4y +1 = 0).
82. 1 ABCDA1B1C1D1 . BD1 , - DC1D1.
83. ABCDA1B1C1D1; - AA1, L - CC1D1D. BKL D1.
84. ABCDA1B1C1D1, = 4, AD = 6, AA1 = 2. F K AD B1C1 , AF:FD = C1K:KB1 = 1:2, P - ABCD. PK B1F.
85. ABCD. D - ; DA = 1, DB = 2, DC = 3. , D.
86. (1; 0; 1), (-2; 2; 1), (2; 0; 3) D (0; 4; -2). , D . (2x + 3y - z - 14 = 0).
87. ABCDA1B1C1D1 , B1C1 C1D1, .
88. ( = ). (1; -2; 1), (3; 2; -3). . . (9).
89. ABCDA1B1C1D1 2, - 4. - CD K - C1. DK D1C . B1 .
90. (1; 1; 5), (4; 7; 5), (8; 5; 5), D (5; -1; 5) D. .
91. (4, 14.76.50). D (3; 1; 2), (0; -1; -1), (-1; 1; 0). BD.
CV 92. (4, 14.76.51). , (1; -1; 1), (1; 3; 1), (4; 3; 1), D (4; -1; 1) . .
93. (2; -3; 0), (2; -1; 1), (0; 1; 4). , D . (45)
94. (3; 0; 1), (-1; 4; 1), (5; 2; 3), D(0; -5; 4). , G - BCD.
95. ABCA1B1C1 3. A1, : (1; 0; 1), (2; 0; 0), (0; 1; 0).